Our Lady of Aparecida is a significant national holiday in Brazil. It is observed annually on October 12 and celebrates the country's patroness, the Virgin Mary, known as Our Lady of Aparecida. Legend has it that in the year 1717, fishermen discovered the statue of the Virgin Mary in the Paraíba River and later, they caught plenty of fish after initially being unsuccessful. The small statue, which measures only 40 centimeters in height, has been credited with numerous miracles, strengthening devotion among the Brazilian Catholic community.

The holiday is marked with a wide array of festivities across the country. Brazil is predominantly Catholic, and hence grand church services, processions, and pilgrimages take place in honor of the Virgin Mary. A notable landmark associated with this holiday is the Basílica of Our Lady of Aparecida in the state of São Paulo, which is one of the largest cathedrals in the world. Thousands of pilgrims flock to this spot on the holiday to pay their respects.

Besides the religious observances, the day is also a moment for families to get together. Schools, businesses, and offices are closed as it’s a public holiday, aiding to the communal and festive feeling of the day. In traditional Brazilian fashion, the holiday also has its share of colorful parades, firework displays, and music. Participating in the activities or simply enjoying the national holiday atmosphere makes the 'Our Lady of Aparecida' a unique experience.